body {
    font-family: 'Arial', sans-serif;
    background-color: #f4f7fa;
    margin: 0;
    padding: 0;
    color: #333;
}

.container {
    max-width: 960px;
    margin: 0 auto;
    padding: 0 20px;
}

.flex-between {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

header.header {
    background-color: #ffffff;
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.1);
    padding: 15px 0;
}

.logo {
    font-size: 1.5em;
    color: #4CAF50;
    margin: 0;
}
